Abstract: In a brake control system of a vehicle, a non-volatile memory of a micro controller mounted on a control apparatus can be rewritten data. The integrated control apparatus and a plurality of control apparatuses, which control the brake apparatuses to correspondingly installed at each wheel, are connected via the network. The integrated control apparatus, in the case where a request to rewrite a program to a control apparatus is sent from the service terminal which is connected via other networks, transmits an updated program sent from the service terminal, to a target control apparatus of the rewrite request via the network, after sending a brake command to make a vehicle stop. The control apparatus executes rewriting of a program stored in a non-volatile memory of the control apparatus has, by means of the updated program transmitted via the network.